/*
 * Copyright 2017 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.cloud.dataflow.server.controller;

import java.util.List;
import java.util.concurrent.ExecutionException;

import org.springframework.cloud.dataflow.server.controller.support.ApplicationsMetrics;
import org.springframework.cloud.dataflow.server.controller.support.MetricStore;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

/**
 * Controller handling metrics requests for as a passthrough to collector.
 *
 * @author Janne Valkealahti
 */
@RestController
@RequestMapping("/metrics/streams")
public class MetricsController {

	private final MetricStore metricStore;

	/**
	 * Instantiates a new metrics controller.
	 *
	 * @param metricStore the metric store
	 */
	public MetricsController(MetricStore metricStore) {
		this.metricStore = metricStore;
	}

	@RequestMapping(method = RequestMethod.GET)
	public List<ApplicationsMetrics> list() throws ExecutionException, InterruptedException {
		return metricStore.getMetrics();
	}
}
